if you did try that you'd definately need to sterlize the mixture and i dont know how you would get the chunks of the pf cake in there without outside/contaminated air getting to the substrate. The problem is the brown rice flour. It contaminates very easily. If you had a syringe with a wide enough needle, you could grind up your cake in a sterile coffee grinder, add distilled sterlile water then suck into a steile syringe to make a mycelium syringe. Then you could innoculate your mixture through a small hole(s). Squirt the entire syringe in to get faster results. The hardest part about all this is sterlility.
Agian..i'd get a second opinion.
Anyone?

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"IT's two in the morning.....Do you know where your flashlite and paper bag are?"